beginner c++ array == 0 ?

[weirdo123]

hi, do you guys know how to set a loop for condition where it stops when all the array = 0 ?

i tried something like this but it only works for i times.. not until all the array =0..

arr1[5]= {5,5,5,5,5};
arr2[5]= {5,5,5,5,5};

for (int i= 0; i <5; i++)
{
   arr[i];
   do
   {
      //statements//
    }
    while ( arr1[i] == 0 && arr2[i]==0);
}

[AbstractionAnon]

Line 6 does nothing, assuming arr[] is even defined.

You're going to have to write a function that tests if an array is all zeroes.

bool array_is_null (int arr[], size_t sz)
{  for (int i=0; i<sz; i++)
    {  if (arr[i] != 0)
          return false;  // No point in checking further
    }
    return true;  // All entries zero
}

Then you can change line 11 as follows (assuming you want to continue until both arrays are null):

    while (! (array_is_null(arr1,5) && array_is_null(arr2,5)));

[weirdo123]

i see! i will try it.

[ne555]

http://en.cppreference.com/w/cpp/algorithm/all_any_none_of